Description: A National Oceanic and Atmospheric Administration map of the St. Johns River near Norwalk, Florida current to 1976. This National Ocean Survey chart shows all soundings expressed in feet. Navigational aids such as lights, beacons, and buoys are shown as well as obstructions such as ferry crossings, submerged cable areas, pipes, and piles. North American 1927 Datum used. The map scale is 1:40,000. Key to NOAA maps.Source: Natonal Oceanic and Atmospheric Administration, St. Johns River: Dunns Creek to Lake Dexter (Washignton, DC: National Oceanic and Atmospheric Administration, 1976) Map Credit: Courtesy the U.S. National Oceanic and Atmospheric Administration